42721433412709 has 2 divisors, whose sum is σ = 42721433412710. Its totient is φ = 42721433412708.

The previous prime is 42721433412689. The next prime is 42721433412727. The reversal of 42721433412709 is 90721433412724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29316572012484 + 13404861400225 = 5414478^2 + 3661265^2 .

It is a cyclic number.

It is not a de Polignac number, because 42721433412709 - 2³⁵ = 42687073674341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42721433412109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21360716706354 + 21360716706355.

It is an arithmetic number, because the mean of its divisors is an integer number (21360716706355).

Almost surely, 2^{42721433412709} is an apocalyptic number.

It is an amenable number.

42721433412709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42721433412709 is an equidigital number, since it uses as much as digits as its factorization.

42721433412709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 42721433412709 in words is "forty-two trillion, seven hundred twenty-one billion, four hundred thirty-three million, four hundred twelve thousand, seven hundred nine".